Recently I made friend with a girl whom I met on Wycliffe Next Generation community website. She asked some questions about Indonesia because she will be moving there with her family soon for ministry. I remember some of the books that my husband got for himself in getting ready to go to Indonesia.
In your getting to know and preparation to go overseas (short term or long term), one thing among the others things on your preparation list is learning basic language and culture of the country. So here I would like to suggest you books that you can use to prepare your self and get some taste of Indonesian.
First book is Basic Indonesian, An Introduction Coursebook. You can try to order online from Barnes and Noble bookstore where we got it for my husband to learn Indonesian. This book comes with a Audio CD which will be helpful for you to listen and practice the pronunciation.